@nerdware/ddb-single-table/dist/esm/IOActions/validate.js

A schema-based DynamoDB modeling tool, high-level API, and type-generator built to supercharge single-table designs!⚡

import { hasDefinedProperty, ItemInputError, getAttrErrID } from "../utils/index.js";
/**
 * This `IOAction` validates an item's individual properties using
 * attribute's respective `"validate"` functions defined in the schema.
 *
 * @throws {ItemInputError} If any attribute's `"validate"` function returns `false`.
 */
export const validate = function (item, { schemaEntries, modelName, ...ctx }) {
    // Iterate over schemaEntries
    for (let i = 0; i < schemaEntries.length; i++) {
        const [attrName, attrConfig] = schemaEntries[i];
        // If the item does not have the attribute, or if its value is nullish, skip it
        if (!hasDefinedProperty(item, attrName))
            continue;
        // Run "validate" fn if defined in the schema
        if (!!attrConfig.validate && !attrConfig.validate(item[attrName])) {
            // Throw error if validation fails
            throw new ItemInputError(`Invalid value for ${getAttrErrID(modelName, attrName, attrConfig)}.`);
        }
        // Run recursively on nested attributes
        if (attrConfig.schema) {
            this.recursivelyApplyIOAction(this.validate, item[attrName], {
                parentItem: item,
                modelName,
                ...ctx,
                schema: attrConfig.schema, // <-- overwrites ctx.schema with the nested schema
            });
        }
    }
    return item;
};